Short Answer
The Halo is a self-contained air pump mounted on the wheel. It generates air pressure when the wheel rotates and automatically maintains the tire at its configured Cold Inflation Pressure.
Detailed Explanation
Basic Operating Principle
The Halo is a mechanical pump that uses wheel rotation to generate compressed air.
Inside the unit there is a pendulum-like mass, similar to a self-winding watch. While the wheel rotates, the pendulum remains oriented downward due to gravity. This creates relative motion between internal components.
This relative rotational motion drives a pumping mechanism that compresses air.
How Pressure Is Controlled
When tire pressure drops below the configured Cold Inflation Pressure:
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The system detects the pressure deviation using multiple internal pressure sensors
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The Halo pump automatically adds air while the vehicle is moving
Once the target pressure is reached, pumping stops.